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BigJimny Meet 2019 (17 May 2019)

BigJimny Meet and off-road driving day



20TH OCTOBER 2019

BOOK NOW (BOOKING CLOSES EARLY OCTOBER!!) - CLICK HERE


See HERE for details - See HERE for discussion


Noggin and Natter - pre-event chat - Old Bell at Grazeley (part of hotel) 7:30pm 19th October

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Replacement coil springs

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21 Apr 2018 17:09 #191990 by Bajan
Hi all,
The roads here in barbados have many pot holes. My Jimney has 154,00 km on the odometer. The shock absorbers have been replaced, radial arm bushes and 2 small stabiliser bars under the radiator ( not sure what they are called).
The ride is still really rough, when driving over a surface which resembles a wash board surface, usually spilt concrete from cement lorry.
Would new coil springs improve the ride considering the mileage (km) on the clock.
If so which springs would give the best ride, the jeep is used off road, nothing serious just occasional drives on dirt tracks round the suger plantations, but mainly road use.

Any advise would be appreciated

Martin

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21 Apr 2018 17:17 - 21 Apr 2018 17:18 #191991 by Daniel30
Replied by Daniel30 on topic Replacement coil springs
How about lowering your tyre pressure?
Or adjustable shocks oops to late
Last edit: 21 Apr 2018 17:18 by Daniel30.

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21 Apr 2018 17:48 - 21 Apr 2018 17:49 #191993 by Bajan
Replied by Bajan on topic Replacement coil springs
Hi thanks for the reply.
Didn’t really want the expense of new shocks as import duty here is 50%.
What do you recommend as a starting point on tyre pressers.? They are set at the recommended pressure.
Last edit: 21 Apr 2018 17:49 by Bajan.

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21 Apr 2018 17:51 - 21 Apr 2018 17:51 #191994 by Venter
Replied by Venter on topic Replacement coil springs
Common problem in South Africa where there are a lot of gravel roads, the surface gets what we call 'corrugations' after a certain amount of time. Three main methods of countering this.

First thing to do is (as mentioned) is lower your tyre pressure. This can go along with getting a larger tyre with higher sidewall profile so it is able to absorb more of the impacts.

Second is to find an ideal and suffucient enough speed. A lot of people make the mistake of slowing down over them. You need to be going fast enough that your wheels 'skim' over the surface of them rather than dipping into each groove as would happen if you were going slower. Don't be go silly-fast though, because it is still a dirt road after all, but do go faster than you'd think is necessary.

Third is to upgrade your suspension. Not sure what's available there, but better quality coils and dampers do help a bit. But the first two things above will have the greatest effect.
Last edit: 21 Apr 2018 17:51 by Venter.

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21 Apr 2018 18:09 #191995 by Bajan
Replied by Bajan on topic Replacement coil springs
Thanks
The tyres are 205 / 70 / 15
Will try lowering the pressures 3 to 4 pounds, and see what happens.
There’s a section of highway that quite similar the your wash board surface. Drive at 40 km it’s ok, but at 60km
You bounce across the road as the suspension just can not cope. Quite scarie when wet.
Can you recommend shocks and springs I could buy when we are back in the uk?
Thanks for your advise.

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21 Apr 2018 22:43 #192003 by Venter
Replied by Venter on topic Replacement coil springs
On the straighter sections over the corrugations you should be looking at 60kph plus, but obviously not if this puts you in danger because of potholes etc. I'm talking more straight and level dirt roads with only the washboard to worry about. If the road is otherwise in bad condition, better suspension will help the car deal with the other bits (up to a point).

I can't help you with suspension choice much as I haven't tried many, but the Trailmaster Comfort setup is liked by many on this forum (and avalable through the BigJimny website's shop). There's a thread over on the 4x4communityforum website that talks a lot about the best setupup and techniques for dealing with corrugations.

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